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#!/bin/sh
#
# Copyright (C) 2012 OpenWrt.org
#
. /lib/functions.sh
. /lib/ar71xx.sh
get_magic_at() {
local mtddev=$1
local pos=$2
dd bs=1 count=2 skip=$pos if=$mtddev 2>/dev/null | hexdump -v -n 4 -e '1/1 "%02x"'
}
dir825b_is_caldata_valid() {
local mtddev=$1
local magic
magic=$(get_magic_at $mtddev 4096)
[ "$magic" != "a55a" ] && return 0
magic=$(get_magic_at $mtddev 20480)
[ "$magic" != "a55a" ] && return 0
return 1
}
dir825b_copy_caldata() {
local cal_src=$1
local cal_dst=$2
local mtd_src
local mtd_dst
local md5_src
local md5_dst
mtd_src=$(find_mtd_part $cal_src)
[ -z "$mtd_src" ] && {
echo "no $cal_src partition found"
return 1
}
mtd_dst=$(find_mtd_part $cal_dst)
[ -z "$mtd_dst" ] && {
echo "no $cal_dst partition found"
return 1
}
dir825b_is_caldata_valid "$mtd_src" && {
echo "no valid calibration data found in $cal_src"
return 1
}
dir825b_is_caldata_valid "$mtd_dst" && {
echo "Copying calibration data from $cal_src to $cal_dst..."
dd if="$mtd_src" 2>/dev/null | mtd -q -q write - "$cal_dst"
}
md5_src=$(md5sum "$mtd_src") && md5_src="${md5_src%% *}"
md5_dst=$(md5sum "$mtd_dst") && md5_dst="${md5_dst%% *}"
[ "$md5_src" != "$md5_dst" ] && {
echo "calibration data mismatch $cal_src:$md5_src $cal_dst:$md5_dst"
return 1
}
return 0
}
dir825b_do_upgrade_combined() {
local fw_part=$1
local fw_file=$2
local fw_mtd=$(find_mtd_part $fw_part)
local fw_length=0x$(dd if="$fw_file" bs=2 skip=1 count=4 2>/dev/null)
local fw_blocks=$(($fw_length / 65536))
if [ -n "$fw_mtd" ] && [ ${fw_blocks:-0} -gt 0 ]; then
local append=""
[ -f "$CONF_TAR" -a "$SAVE_CONFIG" -eq 1 ] && append="-j $CONF_TAR"
sync
dd if="$fw_file" bs=64k skip=1 count=$fw_blocks 2>/dev/null | \
mtd $append write - "$fw_part"
fi
}
dir825b_check_image() {
local magic="$(get_magic_long "$1")"
local fw_mtd=$(find_mtd_part "firmware_orig")
case "$magic" in
"27051956")
;;
"43493030")
local md5_img=$(dd if="$1" bs=2 skip=9 count=16 2>/dev/null)
local md5_chk=$(dd if="$1" bs=64k skip=1 2>/dev/null | md5sum -); md5_chk="${md5_chk%% *}"
local fw_len=$(dd if="$1" bs=2 skip=1 count=4 2>/dev/null)
local fw_part_len=$(mtd_get_part_size "firmware")
if [ -z "$fw_mtd" ]; then
ask_bool 0 "Do you have a backup of the caldata partition?" || {
echo "Warning, please make sure that you have a backup of the caldata partition."
echo "Once you have that, use 'sysupgrade -i' for upgrading to the 'fat' firmware."
return 1
}
fi
if [ -z "$md5_img" -o -z "$md5_chk" ]; then
echo "Unable to get image checksums. Maybe you are using a streamed image?"
return 1
fi
if [ "$md5_img" != "$md5_chk" ]; then
echo "Invalid image. Contents do not match checksum (image:$md5_img calculated:$md5_chk)"
return 1
fi
fw_len=$((0x$fw_len))
fw_part_len=${fw_part_len:-0}
if [ $fw_part_len -lt $fw_len ]; then
echo "The upgrade image is too big (size:$fw_len available:$fw_part_len)"
return 1
fi
;;
*)
echo "Unsupported image format."
return 1
;;
esac
return 0
}
platform_do_upgrade_dir825b() {
local magic="$(get_magic_long "$1")"
local fw_mtd=$(find_mtd_part "firmware_orig")
case "$magic" in
"27051956")
if [ -n "$fw_mtd" ]; then
# restore calibration data before downgrading to
# the normal image
dir825b_copy_caldata "caldata" "caldata_orig" || {
echo "unable to restore calibration data"
exit 1
}
PART_NAME="firmware_orig"
else
PART_NAME="firmware"
fi
default_do_upgrade "$1"
;;
"43493030")
if [ -z "$fw_mtd" ]; then
# backup calibration data before upgrading to the
# fat image
dir825b_copy_caldata "caldata" "caldata_copy" || {
echo "unable to backup calibration data"
exit 1
}
fi
dir825b_do_upgrade_combined "firmware" "$1"
;;
esac
}
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